package com.kylin.state;
import java.text.SimpleDateFormat;
import java.util.Date;
//模拟倒计时
public class TestSleep2 {

    public static void main(String[] args) throws InterruptedException {
        //systemDate();
        tenDown();
    }
    //打印当前系统的时间
    public static void systemDate(){

        Date startTime = new Date(System.currentTimeMillis());//获取系统当前时间
        while (true){
            try {
                System.out.println(new SimpleDateFormat("HH:mm:ss").format(startTime));
                Thread.sleep(1000);
                startTime = new Date(System.currentTimeMillis());//更新系统当前时间
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
    //倒计时
    public static void tenDown() throws InterruptedException {
        int num = 10;
        while (true){
            Thread.sleep(1000);
            System.out.println(num--);
            if (num<=0){
                break;
            }
        }
    }
}

